SAE AMS 6320L pdf download

SAE AMS 6320L pdf download.Steel Bars, Forgings, and Rings 0.50Cr – 0.55Ni -0.25Mo (0.33 – 0.38C)(SAE 8735).
1.1 Form:
This specification covers an aircraft-quality, low-alloy steel in the form of bars, forgings, flash welded rings, and stock for forging or flash welded rings.
1.2 Application:
These products have been used typically for parts, 0.75 inch (19.0 mm) and under in nominal sect,on thickness at time of heat treatment, requiring a through-hardening steel capable of developing hardness as high as 40 HRC when properly hardened and tempered and for parts of greater thickness but requiring proportionally lower hardness but usage Is not limited to such applications.
2. APPLICABLE DOCUMENTS:
The issue of the following documents in effect on the date of the purchase order forms a part of this specification to the extent specified herein. The supplier may work to a subsequent revision of a document unless a specific document issue is specified. When the referenced document has been cancelled and no superseding document has been specified, the last published issue of that document shall apply.
2.1 SAE Publicat,ons:
Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001 or www.sae.org.
AMS 2251 Tolerances, Low-Alloy Steel Bars
AMS 2259 Chemical Check Analysis Limits, Wrought Low-Alloy and Carbon Steels AMS 2301 Steel Cleanliness, Aircraft Quality, Magnetic Particle Inspection Procedure
2.1 (Continued):
AMS 2370 Quality Assurance Sampling and Testing, Carbon and Low-Alloy Steel, Wrought Products and Forging Stock
AMS 2372 Quality Assurance Sampling and Testing, Carbon and Low-Alloy Steel, Forgings AMS 2806 Identification, Bars, Wire. Mechanical Tubing, and Extrusions, Carbon and Alloy
Steels and Corrosion and Heat-Resistant Steels and Alloys
AMS 2808 Identification, Forgings
AMS 7496 Rings, Flash Welded Carbon and Low-Alloy Steels
AS 1182 Standard Machining Allowance, Aircraft Quality and Premium Aircraft-Quality Steel Products
2.2 ASTM Publications:
Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 or www.astm.org.
ASTM A 255
ASTM A 370
ASTM E 112
ASTM E 350
ASTM E 381 ASTM E 384
Determining Hardenability of Steel
Mechanical Testing of Steel Products
Determining Average Grain Size
Chemical Analysis of Carbon Steel, Low-Alloy Steel, Silicon Electrical Steel. Ingot
Iron, and Wrought Iron
Macroetch Testing, Steel Bars, Billets. Blooms, and Forgings
Microindentation Hardness of Materials
3, TECHNICAL REQUIREMENTS:
3.1 Composition:
Shall conform to the percentages by weight shown in Table 1, determined by wei chemical methods In accordance with ASTM E 350, by spectrochemical methods, or by other analytical methods
acceptable to purchaser:
3.1.1 Check Analysis: Composition variations shall meet the applicable requirements of AMS 2259.
3.2 Condition:
The product shall be supplied in the following condition: hardness and tensile strength shall be determined in accordance with ASTM A 370;
3.2.1 Bars:
3.2.1.1 Bars 0.500 Inch (12.70 mm) and Ijnderin Nominal Diameter or Least Distance Between Parallel Sides: Annealed and cold finished having tensile strength not higher than 120 ksi (827 MPa) or equivalent hardness (See 8.2).
3,2.1.2 Bars Over 0.500 Inch (12.70 mm) in Nominal Diameter or Least Distance Between Parallel Sides: Hot finished and annealed unless otherwise ordered, having hardness not higher than 229 HB. or equivalent (See 8.3). Bars ordered cold finished may have hardness as high as 241 HB, or equivalent.
3.2.2 Forgings and Flash Welded Rings: As ordered.
3.2.2.1 Flash welded rings shall not be supplied unless specified or permitted on purchaser’s part drawing. When supplied, rings shall be manufactured in accordance with AMS 7498.
3.2.3 Stock for Forging or Flash Welded Rings: As ordered by the forging or flash welded ring manufacturer.
3.3 Properties:
The product shall conform to the following requirements; hardness testing shall be performed in
accordance with ASTM A 370:
3,3.1 Macrostructure: Visual examination of transverse full cross sections from bars, billets, and stock for forging or flash welded rings, etched In hot hydrochloric acid in accordance with ASTM E 381, shall show no pipe or cracks. Porosity, segregation, inclusions, and other imperfections shall be no worse than the rnacrographs of ASTM E 381 shown In Table 2: